LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2004 >> Crossfire Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Electrical Diagnostics >> Diagnosis And Testing >> DTC P0221: Idle Speed Performance >> Diagnostic Test >> 1. Check For Current DTC
April 5, 2026: LEMON Manuals is launched! Read the announcement.

1. Check For Current DTC

NOTE: Diagnose and repair any Throttle Body or Accelerator Pedal Position Sensor (APPS) DTC before diagnosing the DTC.
NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.
NOTE: Check for any Technical Service Bulletins that may apply.
NOTE: If the PCM detects and stores a DTC, the PCM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the DRB III(R) at the same time the DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for a DTC.

Turn the ignition on.

With the DRB III(R), erase PCM DTCs.

NOTE: It maybe necessary to road test the vehicle for this DTC to set.

With the DRB III(R), read the PCM DTCs.

Did this DTC set again? 

  1. Yes  >> Go To 2
  2. No  >> Go To 6 
scientia non olet · About LEMON Manuals